this is in daly city. part of a hillside has given away after some sort of water main break. >> a river of mud and debris came rushing down the hill. this happened around 4 this morning. dozens of residents remain evacuated and water service is out for about 100 people. elissa harrington is on the ground getting all the latest information from the scene and what can you tell us. >> reporter: we're here along lausanne avenue where several blocks with closed off to traffic. trying to clean up the mess. you can see the flooding behind me, a lot of mud and water, but with me i have matt, the pio with north county fire. what happened. >> we were dispatched for a public assist. our fire crews got on scene with local law enforcement and we had a water plain break that was flowing through the street, a lot of mud and debris. got about 4 blocks closed off at this time. we evacuated about 8 homes, about 40 people. we sent those folks over to a senior center just for their safety primarily. none of the debris has flo